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Operating environment Centos 7 DRBDADM_API_VERSION=2DRBD_KERNEL_VERSION=9.0.14DRBDADM_VERSION_CODE=0x090301 DRBDADM_VERSION=9.3.1 Corosync Cluster Engine, version '2.4.3' Pacemaker 1.1.18-11.el7_5.3 crm 3.0.0 Network Topology Installation configuration steps Install DRBD/Corosync/Pacemaker/Crmsh Reference for installation and ...

Android Automotive Android Automotive is a new feature of Android Oreo. From AOSP's code, Android O already contains the whole framework from Application to Framework to HAL. In this chapter, we briefly go through the following Android Vehicle framework and focus on Vehicle HAL. The overall structure is roughly the following: The above struct ...

What data type is uint8_t/uint16_t/uint32_t/uint64_t? It is often encountered in embedded programming. First #define uint unsigned int; The difference between int and uint is that one is signed and the other is unsigned. uint is often used in microcontroller to define an unsigned integer variable. Types ending with *_ ...

8.10 shell special symbol cut command Special symbols "*" stands for zero or more characters "?" Represents a character "#" Annotation Symbol Symbol of \"De-meaning "|" Pipeline Character cut usage [root@lixiang01 ~]# cat /etc/passwd |head -2 root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin ...

wait for scn ack is a waiting event that may be common in RAC environments, meaning waiting for a SCN response across instances. Top 5 Timed Events Avg %Totalr ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time Wait Class ...

Title Link F. Dasha and Photos time limit per test 4 seconds memory limit per test 512 megabytes input standard input output standard output Dasha decided to have a rest after solving the problem D and began to look photos from previous competitions. Let's call photos as the matrix with the size n × m, whi ...

The rule for Python variable scope is LEGB Explanation of the meaning of LEGB:L - Local(function); namespaces within functionsE - Enclosing function locals; namespaces for externally nested functions (such as closure)G - Global(module); the namespace of the module (file) where the function definition is locatedB - Builtin(Python); namespace for ...

Reference page: http://www.yuanjiaocheng.net/webapi/web-api-route.html http://www.yuanjiaocheng.net/webapi/parameter-binding.html http://www.yuanjiaocheng.net/webapi/action-method-returntype.html http://www.yuanjiaocheng.net/webapi/web-api-reqresq-format.html http://www.yuanjiaocheng.net/webapi/media-formatter.html In the previous article Bowen ...